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spray guns for gelcoat

Old 01-22-2019, 03:22 AM
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Default just think about it how to do !!

Originally Posted by busanga View Post
Ni Hao ! Tunnles....would love to see video of your spraying technique. i live in Ghana, West Africa and would like to try spraying Gel coat (as a hobbyist , not commercial)

xin nian kuai le
Any kind of spraying you mostly always shoot straight at a surface and spray blasts to and goes all ways left and right up and down YES ??
SO WHAT I LEARNED WAS SHOOT AT A SLIGHT ANGLE to one side and the over spray goes the way the gun is pointer !!
If you right handed the spray goes left direction ! I the left handed the spray goes in right direction and away from you and the air coming out of the gun is enough to create a slight draught to carry the spray completely away from you !
Takes practice to learn but I learned and used this technique for 50 years and I never get over spray or crap on me ever ! Never wear gloves , never wear a respirator , and never get any thing on my cloths or hands or my feet !

Last edited by tunnles; 01-22-2019 at 06:49 AM.
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Old 01-22-2019, 06:20 AM
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Originally Posted by tunnles View Post
Never wear gloves , never wear a respirator , and never get any thing on my cloths or hands or my feet !
I think we have an explanation!
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Old 01-22-2019, 06:26 AM
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Originally Posted by bills106 View Post
I think we have an explanation!
Thanks a lot Bill, just spewed coffee all over the keyboard
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Old 01-22-2019, 07:02 AM
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I have never ever been able to understand why SIMPLE things are so hard for people to understand ! Its logical it doesn't even have to be thought about it just come natural and instinctively point it in another direction and blow the spray away from you !
Even a two year old kid with a water hose knows how not to get wet !
DEALING with adults can be exasperating most of the time !! and the other phenomenon is the more highly educated people are the more stupid they become .
I have a friend that's a professor and she is the most stupid highly educated person I have ever known ever !
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Old 01-22-2019, 07:03 AM
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Originally Posted by bills106 View Post
I think we have an explanation!
!!!???!!!
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Old 01-22-2019, 09:12 AM
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Originally Posted by tunnles View Post
Any kind of spraying you mostly always shoot straight at a surface and spray blasts to and goes all ways left and right up and down YES ??
SO WHAT I LEARNED WAS SHOOT AT A SLIGHT ANGLE to one side and the over spray goes the way the gun is pointer !!
If you right handed the spray goes left direction ! I the left handed the spray goes in right direction and away from you and the air coming out of the gun is enough to create a slight draught to carry the spray completely away from you !
Takes practice to learn but I learned and used this technique for 50 years and I never get over spray or crap on me ever ! Never wear gloves , never wear a respirator , and never get any thing on my cloths or hands or my feet !


I knew it. The fumes and particles have finally got to him. Too much MEK and skin absorption..
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Old 01-22-2019, 09:34 AM
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He was talking about smelling acetone on another thread haha
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Old 01-23-2019, 04:59 PM
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Default The acetons you buy have alsorts of crap in them

Originally Posted by HarvestTime View Post
He was talking about smelling acetone on another thread haha
Acetone you recycle is pure and has very little smell BUT evaporates much quicker ! Great stuff to use in a cut or scratch ! never festers and heals completely without any making or scars of any sort !
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Old 01-23-2019, 05:18 PM
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Man I hope your kidding
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Old 01-23-2019, 05:30 PM
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Originally Posted by Ahhr Sea View Post
Has anyone found a nozzle tip for a Harbor Freight HVLP Gravity Feed that will work with spraying gel coat?
Primer spraying nozzles are usually 2.3 and 2.5 mm and will apply more faster. I own a hvlp i bought for $40 on amazon with the full liter aluminum can that will not spill shooting down if you use 600 ml.
It will shoot undiluted gel but unless you do dilute orange peel will be more of a problem than when using a 1.4 mm finish paint sprayer. This depends on which gel you buy with or without wax, prompted mon promoted etc.
The last job i did took 3 hrs to spray 7 coats on 550 ft2 x 7 coats with the hvlp and we only had to clean gun when finished after spraying 10 gals. I thinned gel with 20% acetone to get smooth finish at 25 psi but testing same on a throwaway piece the day before prior to shooting boat is recommended

Last edited by Bullshipper; 01-23-2019 at 05:46 PM.
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Old 01-23-2019, 06:11 PM
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Originally Posted by HarvestTime View Post
Man I hope your kidding
If you end up on the operating table with a very messy wound they may use acetone to clean you up... at least that used to be a common procedure.
The only time that I've gotten acetone that I thought was dirty it came from south Korea by way of Fiber Lay.
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Old 01-23-2019, 06:20 PM
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I worked with a guy that used to edge parts all day without a respirator. He wound up getting half his stomach removed due to cancer. Keep spraying without a mask dummy.
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Old 01-23-2019, 06:31 PM
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Originally Posted by Bullshipper View Post

Primer spraying nozzles are usually 2.3 and 2.5 mm and will apply more faster. I own a hvlp i bought for $40 on amazon with the full liter aluminum can that will not spill shooting down if you use 600 ml.
It will shoot undiluted gel but unless you do dilute orange peel will be more of a problem than when using a 1.4 mm finish paint sprayer. This depends on which gel you buy with or without wax, prompted mon promoted etc.
The last job i did took 3 hrs to spray 7 coats on 550 ft2 x 7 coats with the hvlp and we only had to clean gun when finished after spraying 10 gals. I thinned gel with 20% acetone to get smooth finish at 25 psi but testing same on a throwaway piece the day before prior to shooting boat is recommended
That should be avoided, most gelcoat manufacturers will limit it to 2%.
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Old 01-23-2019, 06:36 PM
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Originally Posted by 81Malibu View Post
I worked with a guy that used to edge parts all day without a respirator. He wound up getting half his stomach removed due to cancer. Keep spraying without a mask dummy.
Many of the guys I've worked with over my fiber glassing career have died over the years and yes some from Cancer !
Like I described working without a mask and not getting crap all over myself I have taught other people how to do the same and it becomes a habit very quickly of working clean ! Its only grubby work habits that are the biggest problems ! Plus dirty habits make for bad not nice products as well ! Take pride in how you work and it reflected in the work you produce and in you general appearance as well !

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Old 01-23-2019, 06:42 PM
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Originally Posted by tunnles View Post
Many of the guys I've worked with over my fiber glassing career have died over the years and yes some from Cancer !
Like I described working without a mask and not getting crap all over myself I have taught other people how to do the same and it becomes a habit very quickly of working clean ! Its only grubby work habits that are the biggest problems ! Plus dirty habits make for bad not nice products as well ! Take pride in how you work and it reflected in the work you produce and in you general appearance as well !
You just keep on believing that, and Iíll wear my safety equipment.
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Old 01-23-2019, 06:49 PM
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Originally Posted by 81Malibu View Post

Iíll give it a second vote. Iíve sprayed everything, primer, base/clear, and gel coat, with these guns with good results. A little pricey for a plastic gun but very versatile with the interchangeable nozzle sets. They even have a version that pressurizes the cup to spray chip guard now.
Agree completely but Iím super biased since I worked for 3M for over 2 decades and just retired 6 months ago. 6 different size nozzles always them to spray anything. If youíre doing a bigger job you can load multiple 32 oz cups and switch them out in a few seconds. The nozzles can be easily cleaned with an ounce of solvent or thrown away since they are only about $5 each. Pressure pots have their place for bigger jobs certainly but not worth the hassle especially on smaller jobs.
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Old 01-23-2019, 07:04 PM
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Originally Posted by Ahhr Sea View Post
Has anyone found a nozzle tip for a Harbor Freight HVLP Gravity Feed that will work with spraying gel coat?
The older Harbor Freight guns could be drilled out to 3mm and spray gel coat much better. The newer ones canít be drilled out, or at least the last two I did wouldnít spray afterwords.
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Old 01-23-2019, 08:37 PM
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Who in the right mind would want to DRILL THE NOZZEL of a spray gun ??
totally insane , in all my time in composites I have never ever even thought of such stupidity ! have sprayed big swimming pools ,140 foot boats ,and everything down to small canoes and not once had any problems with the equipment ive had to use in any country !
Poor trades men always blame there tools and equipment !
Brilliant minds make this equipment and simple minded clueless people destroy it !
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Old 01-24-2019, 05:49 AM
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Someone is tripping balls out on carcinogens...
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Old 01-24-2019, 06:39 AM
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Originally Posted by Chaps View Post
One vote for 3M Accuspray (or whatever they call it), no clean-up, sprays upside down, disposable cups and spray heads, etc. Big nozzles for laying on high viscosity coatings, etc
Yes, quick and simple, I use them when ever possible

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